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WO2024061688A1 - Évitement d'émissions dans la production de pouzzolanes artificielles en matériau minéral, en particulier des argiles - Google Patents

Évitement d'émissions dans la production de pouzzolanes artificielles en matériau minéral, en particulier des argiles Download PDF

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Publication number
WO2024061688A1
WO2024061688A1 PCT/EP2023/074967 EP2023074967W WO2024061688A1 WO 2024061688 A1 WO2024061688 A1 WO 2024061688A1 EP 2023074967 W EP2023074967 W EP 2023074967W WO 2024061688 A1 WO2024061688 A1 WO 2024061688A1
Authority
WO
WIPO (PCT)
Prior art keywords
residence time
calciner
reactant
combustion chamber
supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2023/074967
Other languages
German (de)
English (en)
Other versions
WO2024061688A9 (fr
Inventor
Guido Grund
Dirk Schefer
Melanie Flaßpöhler
Eugen Wagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from LU103008A external-priority patent/LU103008B1/de
Priority claimed from DE102022209826.9A external-priority patent/DE102022209826A1/de
Application filed by ThyssenKrupp AG, ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp AG
Priority to EP23768861.9A priority Critical patent/EP4544248A1/fr
Priority to CN202380066241.3A priority patent/CN119895216A/zh
Publication of WO2024061688A1 publication Critical patent/WO2024061688A1/fr
Publication of WO2024061688A9 publication Critical patent/WO2024061688A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/12—Natural pozzuolanas; Natural pozzuolana cements; Artificial pozzuolanas or artificial pozzuolana cements other than those obtained from waste or combustion residues, e.g. burned clay; Treating inorganic materials to improve their pozzuolanic characteristics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/364—Avoiding environmental pollution during cement-manufacturing
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
    • F27B7/2033—Arrangements of preheating devices for the charge consisting of a single string of cyclones with means for precalcining the raw material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
    • F27D2019/0015—Monitoring the composition of the exhaust gases or of one of its components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0018—Monitoring the temperature of the atmosphere of the kiln
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation

Definitions

  • the invention relates to a device and a method with which exhaust gas treatment for converting pollutants is possible within the process and thus without downstream exhaust gas treatment, which in turn reduces or avoids the energy consumption for exhaust gas treatment.
  • Substitute fuels are increasingly being used to replace primary raw materials such as coal dust and, in particular, to make a contribution to climate neutrality.
  • substitute fuels are often more difficult to ignite and must also have a minimum burning time and a minimum burning temperature due to legal requirements. Therefore, such substitute fuels are often burned in combustion chambers attached to the side of the actual treatment device. This has the advantage of as direct a connection as possible between heat generation in the combustion chamber and heat consumption through the implementation in the treatment device.
  • nitrogen oxides are formed, briefly summarized as NO NO Hydrocarbon C x H y can be reacted with oxygen to form water and carbon dioxide.
  • a temperature window of over 800 °C makes sense for this implementation. Therefore, in exhaust gas treatment it is usually necessary to reheat the comparatively cold exhaust gases, which consumes energy and often requires additional heat exchangers.
  • a process for producing artificial pozzolans is known from WO 2012/082 683 A1.
  • the temperature control of a calciner is known from EP 1 898 171 A1.
  • the object of the invention is to save energy when treating exhaust gases and thus avoid further CO2 emissions, for example from the combustion of fuels as a heat source.
  • the device according to the invention is used for the thermal treatment, for example and in particular of mineral material, in particular clays, for the production of artificial pozzolans as an additive for cement clinker.
  • Clays have increasingly established themselves as an important raw material in the cement industry, as less or no CO2 is released from the raw material during their thermal treatment, as happens, for example, when burning limestone.
  • the temperature for activating mineral materials, especially clays can often be below 800 °C, the temperature inside the calciner is not sufficient to reliably convert pollutants.
  • the device has at least a preheater, a calciner and a material cooler.
  • the preheater is, for example, as Direct current heat exchanger with cyclone separator or designed as a cascade of two to six direct current heat exchangers with cyclone separator.
  • the preheater can also be designed as a cross-flow heat exchanger.
  • the material cooler is also preferably designed as a direct current heat exchanger with a cyclone separator or as a cascade of two to six direct current heat exchangers with a cyclone separator.
  • the material cooler can also be designed as a cross-flow heat exchanger. A stream of solids is fed into the preheater, from the preheater into the calciner, from the calciner into the material cooler and out of the material cooler.
  • a gas stream is led into the material cooler, from the material cooler into the calciner, from the calciner into the preheater and out of the preheater.
  • the device has a combustion chamber.
  • the gas stream from the material cooler is at least partially guided through the combustion chamber into the calciner.
  • the thermal energy necessary for the process is provided by burning natural gas, hydrogen, coal, ammonia or alternative fuels such as biomass, used tires or household waste.
  • Such systems are known for the thermal treatment of mineral substances, especially clays.
  • a dwell time device is arranged between the combustion chamber and the calciner, whereby the combustion chamber is arranged outside the solids flow.
  • Pollutants such as NO X
  • Hydrocarbons and hydrocarbon-containing compounds can also escape from the fuel. This can be a relevant issue, especially when using alternative fuels.
  • the combustion chamber is usually arranged either inside the calciner, for example in the case of natural gas firing, or directly on the calciner, especially for alternative fuels.
  • the direct connection ensures that heat losses are avoided and also saves investment costs and installation space. This means that the heat is generated as close as possible to the place where it is needed for the desired conversion.
  • the residence time device can be used to separate the temperatures for the exhaust gas treatment in the residence time device and the thermal treatment, for example of the clay, in the calciner, whereby a suitable temperature window can be selected for both the exhaust gas treatment and the thermal treatment.
  • the temperature in the residence time device can be selected to be higher than in the calciner, so that combustion of C x H y can take place here, especially with oxygen, or in the presence of, for example, ammonia NO X can be converted to nitrogen (and water) by synproportionation of NO X and NH3.
  • the type of pollutants usually depends very much on the type of fuel used.
  • the residence time device is also preferably arranged completely outside the solids stream, although a certain degree of backmixing cannot naturally be ruled out at the connection between the residence time device and the calciner. However, the net gas flow is entirely directed from the combustion chamber to the calciner.
  • an auxiliary combustion device is arranged between the combustion chamber and the residence time device and/or in the residence time device.
  • the combustion chamber is designed to burn substitute fuels.
  • Substitute fuels usually have a larger fluctuation in calorific value.
  • the auxiliary combustion device is preferably designed to burn a fuel that enables rapid and specifically adjustable combustion.
  • the auxiliary combustion device is preferably designed to burn a fuel that is selected from the group comprising pulverized coal, natural gas, hydrogen, biogas and ammonia. This makes it possible to avoid temperature fluctuations caused by fluctuations in the fuel material in the Combustion chambers are created to be balanced in a targeted and rapid manner, so that a stable temperature is guaranteed in the residence time device and the process of pollutant degradation takes place reliably.
  • the residence time device is tubular.
  • the tubular residence time device can be designed in the shape of a swan neck.
  • the tubular residence time device can be designed as an expanded pipeline.
  • the residence time device can optionally be equipped with one or more flow internals that improve intensive mixing of the gas within the device.
  • a first reactant supply is arranged between the combustion chamber and the residence time device.
  • the reactant supply serves to supply a reactant for the conversion of pollutants. Since the pollutants to be treated are very dependent on the fuel burned in the combustion chamber, the reactant and thus the first reactant feed must be selected depending on the fuel to be used in the combustion chamber.
  • the first reactant supply is designed to supply oxygen, for example in the form of air or air preheated in the material cooler.
  • Oxygen is required as a reactant for the conversion of hydrocarbon C x H y to water and carbon dioxide.
  • the first reactant supply is designed to supply various types of reducing agents, for example ammonia, urea, their compounds or solutions, in particular aqueous solutions.
  • Ammonia or urea can synproportionate with nitrogen oxides NO X to nitrogen.
  • the device has at least a first NO x analyzer.
  • the NO x analyzer is used to record the NO x Concentration.
  • a device using infrared spectroscopy is usually used as the NO x analyzer.
  • the at least one first NOx analyzer is arranged in the residence time device or between the residence time device and the calciner. This has the advantage of immediate feedback and faster control. Additionally or alternatively, the at least one first or one second NOx analyzer can be arranged in or behind the preheater. The advantage of this embodiment is that the gases are significantly cooler here, which simplifies the measurement.
  • the at least one first or a second NOx analyzer can also be arranged after the calciner or even after the preheater, since in these the temperature for the formation of NOx should no longer be high enough, so that this value for the NOx - Content in the residence time device is meaningful.
  • the device has at least a first NHs analyzer.
  • the NHs analyzer is used to record the NH3 concentration in the gas stream.
  • several NHs analyzers are used to determine the concentration at different points in the exhaust gas flow.
  • the least two NHs analytes are located in different levels of the calciner and regulate/control the addition of the reactant in order to determine the utilization of the reactant and thus ensure effective use of the reactant.
  • the at least one NHs analyzer preferably the at least two NHs analyzers, are, for example and preferably, in spatial proximity to the at least one NO x analyzer and/or at least one temperature sensor.
  • the NH3 analyzer(s) are connected via at least one dosing system to corresponding containers, preferably to at least one container for ammonia.
  • ammonia can be injected into the gas stream at different points and/or levels in the same or different amounts and/or concentrations.
  • the device has at least a first control device.
  • the at least one first control device is designed to read out the at least one first NOx analyzer.
  • the at least one first control device is designed to control the first reactant feed and/or an optional second reactant feed as a function from the NO x value detected by at least a first NO x analyzer and regulates the first reactant supply and/or the optional at least one further reactant supply, preferably in different levels and/or with several nozzles, depending on the detected NO x -value.
  • This makes it possible to specifically add the reactant, for example ammonia, which in turn means that an overdose of the reactant and the associated emission of, for example, ammonia can be avoided.
  • the device has at least a first control device.
  • the at least one first control device is designed to read out the at least one first NHs analyzer.
  • the at least one first control device is designed to control the first reactant feed and/or at least one further reactant feed depending on the NHs value detected by at least one first NHs analyzer and regulates the first reactant feed and/or the at least one optional second reactant feed depending on the recorded NH3 value.
  • This makes it possible to specifically add the reactant, for example ammonia, which in turn means that an overdose of the reactant and the associated emission of, for example, ammonia can be avoided.
  • the device has a temperature sensor.
  • Temperature sensor is to be understood broadly in the sense of the invention and includes any sensor system for temperature detection.
  • the temperature sensor can be a thermocouple.
  • a temperature sensor can also be an acoustic sensor, which determines the temperature over a spatial distance using the speed of sound.
  • the temperature sensor is preferably arranged in the first combustion chamber, in the residence time device or between the combustion chamber and the residence time device.
  • the device can also have several temperature sensors, in particular at the aforementioned positions.
  • the device has at least a first control device.
  • the at least one first control device is designed to read out the temperature sensor or sensors.
  • the at least one first control device is designed to control the first reactant supply and/or an at least optional second reactant supply and/or the auxiliary combustion device depending on the temperature detected by the temperature sensor. This makes it possible to add fuel in a targeted manner, which in turn enables the temperature to be adjusted precisely to the desired temperature window.
  • the first reactant supply is designed for a supply with a pressure of 0.5 bar to 5 bar.
  • a first water supply is arranged adjacent to the first reactant supply.
  • the water injection through the water supply can be used for targeted temperature adjustment in order to optimally set the temperature level for minimizing pollutants.
  • the water supply is usually not only used to supply water; aqueous solutions, in particular process wastewater, are usually used, which can also contain other substances.
  • the calorific value of the other substances is not so high that the cooling effect caused by the evaporation of the water is compensated for.
  • aqueous solutions with a proportion of organic compounds can be used here, since the organic compounds are safely converted under the prevailing conditions.
  • the device has at least a first control device.
  • the at least one first control device is designed to read out the temperature sensor or sensors.
  • the at least one first control device is designed to control the water supply depending on the temperature detected by the temperature sensor. This makes it possible to specifically adjust the temperature to the desired temperature window.
  • the residence time device has a length so that the residence time in the residence time device is between 0.5 s and 10 s, in particular between 1 s and 5 s, particularly preferably from 1.5 s to 2.5 s. This creates a suitable window between sufficient reaction time and heat loss and flow resistance.
  • a reduction device is arranged between the calciner and the material cooler.
  • a reduction device is used to treat the thermally treated material in a reducing atmosphere, in particular for color optimization.
  • gases, solids and/or liquids can be used, for example, which contain, for example, carbon, hydrogen, nitrogen, carbon monoxide or the like or corresponding compounds thereof, for example methane or ammonia or mixtures thereof, as well as additionally also inert gases, in particular nitrogen.
  • the reducing atmosphere can also be generated by substoichiometric combustion (shortage of oxygen).
  • Fe 111 can be reduced to Fe", which results in a reduction in the color of the product and thus increased market acceptance.
  • the residence time device has a catalyst.
  • the catalyst is, for example, a platinum-rhodium catalyst, which is suitable for converting NO X and NH3 into nitrogen.
  • the residence time device has at least one deflection.
  • the residence time device has flow internals for the gas mixture.
  • the residence time device can be designed in the shape of a swan neck.
  • the deflections lead to mixing.
  • differences in height can be compensated for, which promotes a compact design.
  • the residence time device has at least a second reactant supply.
  • the at least second reactant supply is arranged between the combustion chamber and the residence time device or on the residence time device and preferably with an optional Control device connected.
  • the first reactant feed and the at least second reactant feed are designed to feed the same reactant.
  • both can be designed to supply ammonia.
  • the first reactant feed and the at least second reactant feed are spaced apart from one another. This allows the concentration, for example of ammonia for NO x degradation, to be kept more constant.
  • the first reactant supply serves to supply a first reactant, for example NH3 for the NOx degradation
  • the at least second reactant supply serves to supply at least a second reactant, for example O2 or air for the C x H y degradation.
  • the device has an SCR reactor, the SCR reactor being arranged in the gas stream behind the preheater.
  • the SCR reactor can be used in particular as a backup solution. As long as the NO x reduction according to the invention is sufficient, the SCR reactor is not operated, for example, and the necessary energy is therefore saved.
  • the device has a bypass, the bypass being arranged between the combustion chamber and the calciner.
  • the bypass is arranged parallel to the residence time device. A first partial flow is therefore passed through the residence time device and a second partial flow is passed through the bypass. This makes optimal use of the permitted emissions possible.
  • the invention relates to a method for operating a device according to the invention.
  • the temperature in the residence time device is selected between 750 °C and 1300 °C.
  • the temperature in the residence time device is chosen between 800 ° C and 1100 ° C, particularly preferably between 900 ° C and 1050 ° C.
  • mineral material in particular clays or clay-like substances, is thermally treated.
  • the device according to the invention is explained in more detail below using an exemplary embodiment shown in the drawing.
  • the material to be treated for example a clay
  • the material to be treated is fed to the preheater 10 via a material feed 110, preheated and introduced into the calciner 20, where it is thermally treated.
  • the material is transferred to an optional reduction device 100, where it is particularly color-optimized and reaches the material cooler 30, from which the finished product is then removed via a product removal 120.
  • the gas is first fed into the material cooler 30 via a gas supply 130 and heated there by the product to be cooled.
  • the heated gas enters the combustion chamber 40.
  • a substitute fuel for example garbage
  • nitrogen oxides can be formed simply due to the temperature and the presence of nitrogen and oxygen.
  • the combustion chamber (40) and residence time device (50) are preferably equipped with temperature sensors. Furthermore, the gases are hottest when they leave the combustion chamber 40, so this time is ideal for decomposing the nitrogen oxides again.
  • the device has an auxiliary combustion device 60 (optionally several auxiliary combustion devices 60), which is operated, for example, with gas, liquid fuel or coal dust and is therefore able to reliably adjust the temperature.
  • the system has a water supply 62, with which water can be supplied and the temperature can therefore be reduced in a simple manner.
  • the combination of auxiliary combustion device 60 and water supply 62 creates the possibility of a particularly targeted temperature setting.
  • an ammonia solution is injected via a first reactant supply 70.
  • a reaction between NO x and NH3 can take place in the residence time device 50 at, for example, 1000 ° C.
  • the device also has a second reactant feed 72, in which at a later point in the Residence time device 50 ammonia solution is injected again.
  • a NO x analyzer 80 and an NHs analyzer (82) are arranged in the residence time device.
  • a NOx analyzer 80 and an NHs analyzer (82) are arranged after the preheater.
  • the NO x analyzers 80 and the NHs analyzers (82) are connected to a first control device 90, which is dependent on the NO x content detected by the NO x analyzer 80 and the NHs content detected by the NHs analyzer as well as the above Temperature levels detected by temperature sensors regulate the injection of ammonia solution through the first reactant feed 70 and the second reactant feed 72. From there, the warm gas, but freed from NO Calcinators 20 to implement. The gas is led from the calciner 20 into the preheater 10, where it gives off its heat to the material supplied. The exhaust gas from the preheater 10 is then released via a gas outlet 140 and can, for example, be supplied for further treatment, for example for dedusting.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Public Health (AREA)
  • Treating Waste Gases (AREA)
  • Silicon Compounds (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

La présente invention concerne un dispositif de traitement thermique, le dispositif comprenant au moins un préchauffeur (10), un four de calcination (20) et un refroidisseur de matériau (30), un flux solide étant guidé dans le préchauffeur (10), du préchauffeur (10) dans le four de calcination (20), du four de calcination (20) dans le refroidisseur de matériau (30) et hors du refroidisseur de matériau (30), un flux de gaz étant guidé dans le refroidisseur de matériau (30), du refroidisseur de matériau (30) dans le four de calcination (20), du four de calcination (20) dans le préchauffeur (10) et hors du préchauffeur (10), le dispositif ayant une chambre de combustion (40), le flux de gaz étant guidé hors du refroidisseur de matériau (30) au moins partiellement à travers la chambre de combustion (40) dans le four de calcination (20), caractérisé en ce qu'un dispositif de temps de séjour (50) est disposé entre la chambre de combustion (40) et le four de calcination (20).
PCT/EP2023/074967 2022-09-19 2023-09-12 Évitement d'émissions dans la production de pouzzolanes artificielles en matériau minéral, en particulier des argiles Ceased WO2024061688A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23768861.9A EP4544248A1 (fr) 2022-09-19 2023-09-12 Évitement d'émissions dans la production de pouzzolanes artificielles en matériau minéral, en particulier des argiles
CN202380066241.3A CN119895216A (zh) 2022-09-19 2023-09-12 避免矿物材料，特别是粘土制成的人造火山灰的生产过程中的排放物

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102022209826.9 2022-09-19
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LU103008A LU103008B1 (de) 2022-09-19 2022-09-19 Vermeidung von Emissionen bei der Herstellung künstlicher Puzzolane aus mineralischem Material, insbesondere Tonen
DE102022209826.9A DE102022209826A1 (de) 2022-09-19 2022-09-19 Vermeidung von Emissionen bei der Herstellung künstlicher Puzzolane aus mineralischem Material, insbesondere Tonen

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US5975891A (en) * 1996-02-14 1999-11-02 F. L. Smidth & Co., A/S Method for reducing NOx emission from a kiln plant
WO2005108891A1 (fr) 2004-04-16 2005-11-17 Polysius Ag Installation et procede de fabrication de clinker de ciment
EP1898171A1 (fr) 2006-09-11 2008-03-12 ABB Research Ltd Procédé de régulation de temperature pour four à précalcineur
WO2012082683A1 (fr) 2010-12-13 2012-06-21 Flsmidth A/S Procédé de fabrication de pouzzolane synthétique
DE102011014498A1 (de) 2011-03-18 2012-09-20 Outotec Oyj Klinkerersatzstoff
EP2587149A1 (fr) 2011-10-25 2013-05-01 Magnesitas Navarras S.A. Procédé et dispositif de réduction de contenu NOx dans les fumées d'un four à combustion rotative
US9458059B2 (en) 2010-12-13 2016-10-04 Flsmidth A/S Process for the calcination and manufacture of synthetic pozzolan

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5975891A (en) * 1996-02-14 1999-11-02 F. L. Smidth & Co., A/S Method for reducing NOx emission from a kiln plant
WO2005108891A1 (fr) 2004-04-16 2005-11-17 Polysius Ag Installation et procede de fabrication de clinker de ciment
EP1898171A1 (fr) 2006-09-11 2008-03-12 ABB Research Ltd Procédé de régulation de temperature pour four à précalcineur
WO2012082683A1 (fr) 2010-12-13 2012-06-21 Flsmidth A/S Procédé de fabrication de pouzzolane synthétique
US9458059B2 (en) 2010-12-13 2016-10-04 Flsmidth A/S Process for the calcination and manufacture of synthetic pozzolan
DE102011014498A1 (de) 2011-03-18 2012-09-20 Outotec Oyj Klinkerersatzstoff
EP2587149A1 (fr) 2011-10-25 2013-05-01 Magnesitas Navarras S.A. Procédé et dispositif de réduction de contenu NOx dans les fumées d'un four à combustion rotative

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